This is a classic recipe for southern buttermilk biscuits. The biscuits are made with shortening and butter, along with buttermilk and other ingredients. Soft wheat flour will make these even lighter, but any all-purpose flour will be fine. The key is in how much you handle the dough. Knead and roll gently and as little as possible. Square biscuits can be cut out all at once, which means there's no re-rolling scraps. When the scraps are rerolled to cut out additional biscuits, and they will be a bit denser. Serve with delicious southern cream gravy.